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<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
</head>

<body>
  <h1>cors跨域</h1>
  <button id="btn">发送请求</button>
  <script>
    const oBtn = document.getElementById('btn');
    oBtn.onclick = async function () {
      axios.get("http://127.0.0.1:3000/userInfo", {
        params: {
          userId: "001"
        }
      })
    }
  </script>
</body>

</html>